Leonard H Webster

US Patent:

5998888, Dec 7, 1999

Filed:

Jan 20, 1998

Appl. No.:

9/009210

Inventors:

James E. Redburn - Sugar Land TX
Leonard E. Webster - Chicago IL

Assignee:

Leveler - Chicago IL

International Classification:

H02J 102

US Classification:

307105

Abstract:

A power conditioning circuit for conditioning power supplied by a power source at a nominal frequency over line, neutral and ground conductors includes first, second and third impedances coupled to the line, neutral and ground conductors, respectively, and to output lines. Each of the impedances prevents power at frequencies greater than the nominal frequency from reaching the output lines.

US Patent:

8223468, Jul 17, 2012

Filed:

Mar 16, 2009

Appl. No.:

12/381685

Inventors:

Michael W. Januszewski - Downers Grove IL, US
Leonard E. Webster - Chicago IL, US
John E. MacCrisken - Palo Alto CA, US

Assignee:

Leveler LLC - Downers Grove IL

International Classification:

H02H 3/22

US Classification:

361111

Abstract:

A power conditioning circuit for conditioning power supplied by a power source at a nominal frequency over conductors in a polyphase system includes first and second phase conductors. First and second inductors are connected in series between the first and second phase conductors and first and second phase output lines, wherein all of the power supplied by the power source to the first and second phase output lines flows through the first and second inductors. An inductance of each of the first and second inductors increases when power at frequencies greater than the nominal frequency flows through the first and second phase conductors, thereby blocking power at frequencies greater than the nominal frequency from reaching the first and second phase output lines.

US Patent:

62889176, Sep 11, 2001

Filed:

Dec 6, 1999

Appl. No.:

9/456101

Inventors:

James E. Redburn - Sugar Land TX
Leonard E. Webster - Chicago IL

Assignee:

Leveler - Houston TX

International Classification:

H02J 102

US Classification:

363 39

Abstract:

A power conditioning circuit for conditioning power supplied by a power source at a nominal frequency over line, neutral and ground conductors includes first, second and third stages. The first stage provides voltage suppression and includes a set of three metal oxide varistors (MOVs). The second stage provides high frequency power suppression and includes three inductors coupled to the line, neutral and ground conductors, respectively, and to output lines. Each of the inductors prevents power at frequencies greater than the nominal frequency from reaching the output lines and each of the inductors may be rated to compensate for the capacitive impedance characteristics of a load supplied by the power conditioning circuit. The third stage provides voltage suppression and voltage clamping and includes an MOVs and a set of first and second rectifier diodes.

US Patent:

59988886, Dec 7, 1999

Filed:

Jan 20, 1998

Appl. No.:

9/009210

Inventors:

James E. Redburn - Sugar Land TX
Leonard E. Webster - Chicago IL

Assignee:

Leveler - Chicago IL

International Classification:

H02J 102

US Classification:

307105

Abstract:

A power conditioning circuit for conditioning power supplied by a power source at a nominal frequency over line, neutral and ground conductors includes first, second and third impedances coupled to the line, neutral and ground conductors, respectively, and to output lines. Each of the impedances prevents power at frequencies greater than the nominal frequency from reaching the output lines.